NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2015-01-30 586-728 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WARREN MI
2015-01-30 586-735 3XXX4XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2015-01-30 707-572 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EUREKA CA
2015-01-30 716-396 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E WESTVALLEY NY
2015-01-30 778-725 not yet reported which blocks → Distributel 081E Vancouver —
2015-01-30 845-793 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CARMEL NY
2015-01-30 929-372 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NWYRCYZN10 NY
2015-01-30 980-477 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E MOUNTHOLLY NC
2015-01-29 236-363 not yet reported which blocks → Bell Mobility 6574 Cranbrook —
2015-01-29 289-547 not yet reported which blocks → Bell Mobility 6574 Niagara Falls —
2015-01-29 315-795 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROME NY
2015-01-29 505-900 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2015-01-29 506-655 not yet reported which blocks → Bell Mobility Aliant 329A Bathurst —
2015-01-29 551-247 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F JERSEYCITY NJ
2015-01-29 646-931 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NWYRCYZN01 NY
2015-01-29 719-900 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CO 026D COLORDOSPG CO
2015-01-29 778-954 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2015-01-29 807-357 not yet reported which blocks → Bell Mobility 6574 Thunder Bay —
2015-01-29 845-394 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 MIDDLETOWN NY
2015-01-29 845-681 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC- NY 384C SAUGERTIES NY
2015-01-29 914-849 0–9 XXXall 10 · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 WSCHSTZN08 NY
2015-01-29 970-400 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D GREELEY CO
2015-01-29 970-900 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CO 026D FT COLLINS CO
2015-01-28 202-846 0–9 XXXall 10 · 4 holders which blocks → INTRADO COMMUNICATIONS LLC 812C WSHNGTNZN1 DC
2015-01-28 210-596 0–9 XXXall 10 · 3 holders which blocks → SOUTHWESTERN BELL 9533 SANANTONIO TX
2015-01-28 219-351 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F ST JOHN IN
2015-01-28 225-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2015-01-28 318-626 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C SHREVEPORT LA
2015-01-28 318-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2015-01-28 346-219 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HSTNSUBURB TX
2015-01-28 386-777 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C DAYTONABCH FL
2015-01-28 407-613 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D ORLANDO FL
2015-01-28 412-413 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PTGSBNZN14 PA
2015-01-28 423-657 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F MOSHEIM TN
2015-01-28 435-515 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F BRIGHAM CY UT
2015-01-28 480-669 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2015-01-28 484-983 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J W CHESTER PA
2015-01-28 501-777 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AR 348F LITTLEROCK AR
2015-01-28 520-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E TUCSON AZ
2015-01-28 614-350 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F LOCKBOURNE OH
2015-01-28 614-931 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F GROVE CITY OH
2015-01-28 702-937 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2015-01-28 708-986 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BLUEISLAND IL
2015-01-28 725-696 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2015-01-28 725-800 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NV 029F JEAN NV
2015-01-28 737-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C AUSTIN TX
2015-01-28 757-797 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NRFOLKZON4 VA
2015-01-28 779-701 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E KANKAKEE IL
2015-01-28 779-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C ROCKFORD IL
2015-01-28 857-314 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E MILTON MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.